package com.itheima.reggie.filter;


import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "LoginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String uri = request.getRequestURI();
        String[] urls = new String[]{
                "/employee/login",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login",
                "/doc.html",
                "/webjars/**",
                "/swagger-resources",
                "/v2/api-docs"
        };
        boolean flag = check(uri,urls);
        if (flag){
            filterChain.doFilter(request,response);
            return;
        }
        if (request.getSession().getAttribute("employee")!= null){
            long empId = (long) request.getSession().getAttribute("employee");
            BaseContext.setId(empId);
            filterChain.doFilter(request,response);
            return;
        }

        if (request.getSession().getAttribute("user")!= null){
            long userId = (long) request.getSession().getAttribute("user");
            BaseContext.setId(userId);
            filterChain.doFilter(request,response);
            return;
        }

        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));


    }

    private boolean check(String uri, String[] urls) {
        for (String url : urls) {
            boolean flag = PATH_MATCHER.match(url,uri); //
            if (flag){
                return true;
            }
        }
        return false;
    }
}
